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_ _ _ <br /> A <br /> s- <br /> .�, SEQUOIA AL CALRECE]VEo MAYIM <br /> 680 Chesapeake Drive • Redwood City,CA 94083 <br /> (4.15)364-9600 . FAX(41-P)364-9233 <br /> € . -T ewcaw x .Y <br /> a «s ." ��.xWat3rc ChenProject 10: Reeves ves1710 <br /> Main Street <br /> Escalan,CA 95320 <br /> ;AttentlonBill? Channell OC Sam <br /> .., Group: 1042985-2M <br /> Reported:May 1 1991 <br /> a QUALITY CONTROL.DATA REPORT <br /> Benzene <br /> I � Toluene eensene X nas <br /> Method: EPA BozoEPA 8020 <br /> G. EPA 8020 EPA 8820 <br /> Analyst- G.Meyer <br /> i Meyer G.Meyer G.Mayer <br /> Reporting Units: ng n <br /> Date Analyzed: Apr 23, 1991 9 ng fig <br /> Apr 23, 1591 Apr 23, 1991 Apr 23. 1991 <br /> CC Sample: GSLK04=1 GBLK042391 GBLK04Z391 G6LK042391 <br /> Sample Cone.: N.D. N.D. N.D. N.D. <br /> Spike Conc. <br /> Added: 100 100 100 300 <br /> kb. <br /> Conc.Matrix <br /> Spike: 87 <br /> i. 91 9`- 270 <br /> Matrix Spike <br /> %Recovery: $7 91 <br /> 9i 90 <br /> Conc.Matrix <br /> Spike Dup.: g5 95 <br /> 95 290 <br /> Matrix Spike <br /> _ Duplicate <br /> %Recovery: i35 95 95 97 <br /> Relative <br /> %Difference: 2.3 4.3 4.3 7.1 <br /> `•SE IA A!!AI_YTlCAL Recovery Conc.of M.S.•Conc.or Sampre <br /> / x 100 <br /> Spike Conc.Added <br /> Relative%Difference: Cone.of M.S.-Conc.of M.S.D. s 900 <br /> Elizabeth W, ack (Conc.of M.S.+Cont.a1 M.S.D.) 2 ,- <br /> roject Manager <br /> 1042988.WAT <4a <br /> 1i <br />